Optical Determination of the Band Gap and Band Tail of Epitaxial Ag${}_2$ZnSnSe${}_4$ at Low Temperature

S. Perret, Y. Curé, L. Grenet +3

We report on the precise determination of both the band gap E${}_{\text{g}}$, and the characteristic energy $U$ of the band tail of localized defect states, for monocrystalline Ag${}_2$Z…